Transmisssion/reception system, transmitting device and method, and receiving device and method

摘要

The present invention relates to a transmitter and a receiver designed to improve the reliability of communications therebetween. During communication processes under UDP adopted as the transport layer, data having RTP headers is transmitted and received between the transmitter and the receiver. The receiver references the sequence numbers in the received RTP headers to verify the continuity of the numbers. If any data with a serially continuous sequence number is not received, the receiver finds that data to be missing and requests the transmitter to retransmit the data associated with the missing sequence number. The receiver then acquires the missing data that has been retransmitted. This invention applies to transmitters that transmit data and to receivers that receive the transmitted data.